Pump-regulator



(No Model.)

B. J. WOOD. PUMP REGULATOR.

No. 489,516. Patented Jan. 10, 1893.

UNITED STATES PATENT OFFICE.

EDGAR J. WOOD, OF BROOKLYN, NEWV YORK.

PUMP-REGULATOR.

SiEGIFIGATION forming part of Letters Patent No. 489,516, dated January10, 1893.

Application filed July 16, 1892- Serial No. 440,208. (No model.)

To all whom it mayconcern:

Be it known that I, EDGAR J. W001), of Brooklyn, in the county ofKings'and State of New York, have invented a new and useful Improvementin Pump-Regulators, of which the following is aspecification.

My invention relates to improvements in pump regulators in which thepressure of the fluid upon the delivery side of the pump serves to cutofi the supply of motive power for driving the pump.

Myinvention contemplates the introduction of a reducing pressure valvein the pipe which conducts the motive force to the pump and theattachment to a movable part of said reducing valve of an operatingpiston under the control of the pressure of the fluid on the deliveryside of the pump to operate the reducing valve independently of thepressure of the motive force.

A practical embodiment of my invention is represented in theaccompanying drawings in which,

Figure 1 shows the regulator in side elevation in connection with apump, its delivery pipe and the pipe for transmitting the motive forceto the pump and Fig. 2 is an enlarged sectional View of the regulator indetail.

A represents a pump of any well known or approved form, shown in thepresent instance as a duplex pump. Its delivery pipe is represented by Band is here shown as extending to a tank 0, as is common in connectionwith the operation of hydraulic elevators. The pipe for admitting themotive force, as for ex ample steam, to the pump is denoted by D and isprovided with a throttle valve (1. Intermediate of the throttle valveand the pump the pipe D is intercepted bya reducing pressure valve andpump regulator, represented as a Whole by E. The delivery pipe B is incommunication with the regulator E through a pipe I).

The construction of the reducing pressure valve and regulator in detailis as follows: The barrel or coupling section of the regulator isseparated into an inlet chamber e and an outlet chamber e by a web ordiaphragm e in which is an opening around which a valve seat 9 isformed. A piston valve F with a hollow face is adapted to seat upon thevalve seat 6 and to reciprocate within a tubular plug f screwed into thebarrel or coupling section E. The outer end of the tubular plug f isclosed and the head of the valve F is closed with the exception of asmall perforation f therethrough through which communication isestablished between the inlet chamber E and the interior of the hollowplug f exterior to the valve. A spring f inserted between the head ofthe valve F and the end of the plug f exerts its tension to throw thevalve F toward its seat. As a matter of convenience,

I have provided a screw threaded stop-rod G extending through a suitablestuffing box in the head of the plug f for the purpose of positivelylimiting the opening of the valve F and for holding it positively to itsseat, if circumstances render it desirable.

A piston valve H is fitted to reciprocate within a tubular plug itscrewed into the barrel or coupling section E on the outlet or lowpressure side of the valve F. The valve H is provided with a port hleading from its face in communication with the chamber e to a branchpipe I between the tubular plugs h and f so that when the valve H is inits normal position, or at the limit of its movement toward the outletchamber 6, there will be open communication between said outlet chamber6 and the interior of the tubular plug f exterior to the valve F. Thevalve H is limited in its downward movement by a shoulder h The outerend of the tubular plug it is closed and there is fitted thereon acasing K within which a piston in is adapted to reciprocate. The pistonis is provided with a rod is which extends through the head of thehollow plug it and connects with the outer end of the piston valve H.The branch pipe 1) leading from the delivery side of the pump,communicates with the casing K at a point below the piston k. A spring Lis inserted between the piston 10 and a screw-threaded plug M at theouter end of the casing so that by screwing the plug M more or less,tension may be exerted upon the piston to prevent it from moving eitherunder the pressure of the valve beneath it or under the impulse of thefluid within the outlet chamber 6'.

In operation, whenever the pressure upon the delivery side of the pumpreaches a predetermined degree, it will, by its action upon the underside of the piston 10, lift the said piston and thereby slide the pistonvalve 11 in a direction to cut off communication between the chamber eand the interior of the hollow plug f exterior to the valve F. Wheneverthis takes place, the high pressure within the chamber e will beestablished through the perforation f, within the hollow plug f exteriorto the valve F and the latter will close under the influence of gravityor of the spring f or both, and the action of the pump A will bearrested. As soon, however, as the pressure on the delivery side of thepump is diminished, the piston 70 will again return and thereby opencommunication through the port h with the chamber 6' and the interior ofthe plug f, the high pressure within the plug f exterior to the valve Fwill be thereby immediately relieved and the valve F will be thrown openand the pump A again set in action.

In addition to its functions under the pressure of the fluid on thedelivery side of the pump, the regulator will also act simply as areducing pressure valve under the pressure of the actuating fluid,entering the pump through the pipe D. That is, whenever the pressurewithin the chamber 6 passes beyond a predetermined degree, it Will actupon the piston valve H to lift it and thereby out OK communicationbetween the chamber 6 and the interior of the plug f, equalizing thepressure upon the opposite sides of the valve F and permitting it toapproach its seat. Upon the lowering of the pressure within the chamber6', the piston valve H will again re. turn, opening the communicationthrough its port h with the interior of the plug fireliev ing thepressure upon that side of the valve F and again causing it to open toadmit the actuating fluid.

What I claim is:

1. The pump regulator comprising three valves, one under the control ofthe high pressure motive fluid to operate it, a second under the controlof the low pressure motive fluid to operate it and a third under thecontrol of the pressure at the outletting side of the pump to operateit, the second and third named valves being connected to operate as oneand located in chambers independent of each other, and a conduit leadingfrom the outer side of the first named valve into communication with thelow pressure motive fluid said conduit being under control of both thesecond and third named valves to close and open it, substantially as setforth.

2. The reducing pressure valve comprising a barrel or coupling sectionseparated into a high pressure and low pressure chambers, a valve forcontrolling the passage of fluid from one chamber to the other, a closedcasing for said valve, the interior of said casing being incommunication with the high pressure chamber through an opening in thevalve and a piston valve in communication with the low pressure chamberand provided with I a port through it in communication with the interiorof the casing of thefirst named valve, in combination with a pistonWithin an inclosed casing and connected to move with said piston valve,and means for connecting the casing containing said piston with thedelivery side of a pump and for connecting the barrel or couplingsection witha pipe for the transmission of a motive fluid, substantiallyas set forth.

EDGAR J. WOOD. Witnesses:

FREDK. HAYNES, GEORGE BARRY.

